Study On Tool Wear Of Milling Titanium Matrix Composites

Titanium matrix composites (TMCs) have a wide ranges of application, because of itsoutstanding properties, such as high specific modulus, high heat and wear resistance, anti-fatigueand so on, thus TMCs will increasingly be used in many fields such as aeronautics, astronauticsand auto industry, etc. But TMCs consist of a soft matrix holding together extremely hardreinforcing particulate or whisker reinforcements which result in poor machinability andextremely rapid tool wear, low machining efficiency and high cost. So Titanium matrix compositesare limited in the further popularization and application.Thus, it is very significant to optimize milling tools, deeply study the tool wear and tool wearmechanism. Experimental research were carried out by different tools (material, degree,granularity) when milling TMCs which volume fraction with10%enhanced by TiC particles andTiB whisker hybrid.The following works have been developed:1. Experimental research on tool life in milling of TMCs was investigated. The effects ofdifferent tool materials (PCD, cemented carbide), degree, granularity on tool life were studied.2. Experimental research on tool damage and tool wear mechanism in milling of TMCs withdifferent tools was developed. The three-dimensional video microscope, SEM and EDS wereutilized to measure and observe tool wear. Cutting forces and cutting temperature in machineprocess were measured and analyzed. On this basis of above researches, the tool wear mechanismwas revealed.3. Study on surface roughness and micro-hardness in milling of TMCs were carried out.Roughmeter and micro-hardness meter were utilized to measure roughness and micro-hardness.The influences of surface roughness and micro-hardness were analyzed under different tool wearconditions and milling parameters...